class Phone:
    name  = "xxt"
    IMEI = None
    producer = None

    def call_by_4g(self):
        print("4g call~")

class RemoteControl:
    name = "jdz"
    rc_type = "红外遥控"
    def open(selfs):
        print("open remote control")

class Phone2023(Phone, RemoteControl):
    def call_by_5g(self):
        super().call_by_4g()
        print("5g call~")

    def open(selfs):
        print("open and start")


phone2023 = Phone2023()
phone2023.call_by_4g()
phone2023.call_by_5g()
phone2023.open()
# 优先级从左到右
print(phone2023.name)